JPH0726774B2 - Refrigeration equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a refrigerating apparatus in which a refrigerant divided in a distributor is made to flow in parallel to a heat exchanger to form a part of a refrigerating cycle.

(B) Conventional Technology Conventionally, as a configuration example of a distributor for distributing a refrigerant to a heat exchanger in a substantially uniform manner, there is disclosed one disclosed in Japanese Patent Publication No. 54-28974.

According to this content, an orifice is provided in the middle of a straight pipe connected to a bent pipe, a distributor is connected to the end of this straight pipe, and a branch pipe of this distributor is connected to a heat exchange pipe of a heat exchanger.

Then, the refrigerant is guided from the bent pipe to the straight pipe, and the uneven flow of the refrigerant flowing inside the straight pipe is reduced by the orifices so that the refrigerant is distributed substantially evenly to the respective branch pipes.

(C) Problems to be solved by the invention In the structure as described above, if the shape of the orifice diameter is not circular, the flow of the refrigerant discharged from the orifice may be biased, and the flow to the respective branch pipes may be substantially even. Could not be distributed to.

The present invention is intended to distribute the refrigerant flowing in the refrigerant pipe substantially evenly and to flow it to the heat exchanger.

(D) Means for Solving Problems To achieve this object, the present invention provides one inlet and two
In a refrigerating apparatus having a refrigerating cycle in which a refrigerant is split into two flow paths in a heat exchanger using a distributor having two outlets, one inlet and two outlets of the distributor are on the same plane. Along the direction of the thick pipe connected between the inlet and the thin pipe of the distributor, the bent portion along a plane that intersects substantially perpendicular to the plane is formed, and the distributor has a central axis of the thick pipe. It is provided with a distribution surface that is substantially orthogonal to.

(E) Action In the refrigerating apparatus of the present invention, by guiding the refrigerant to the thick tube having a passage larger than the narrow tube, the refrigerant spreads and flows in a gentle state, so that the refrigerant is less likely to flow unevenly, and the bent portion of the thick tube is prevented. By making the refrigerant along the inner wall on the outer peripheral side of this bent portion, the refrigerant along the inner wall of the thick pipe flowing to the outer peripheral sides of both outlets of the distributor is reduced, and this refrigerant is distributed on the distribution surface of the distributor. It is designed to be applied and distributed.

(F) Example In FIG. 1, 1 is a compressor, 2 is an outdoor heat exchanger that acts as a condenser, 3 is a decompression device, 4 is an indoor exchanger that acts as an evaporator, and 5 is an accumulator. The equipment is connected by refrigerant piping to form a refrigeration cycle. As shown in FIG. 2, the indoor heat exchanger 4 is arranged on the front side of the casing 7 of the indoor unit 6. 8
Is a cross flow fan, and 9 is a drain pan, which sucks indoor air from the suction port 10, cools it by the indoor heat exchanger 4, and discharges it from the blowing port 11. Indoor heat exchanger 4
Is formed by inserting heat exchange pipes 12 into laminated pyrate fins and connecting the ends of the pipes with U-shaped pipes 13. The upper U-shaped refrigerant passage 14 and the lower U-shaped refrigerant are formed. aisle
Forming 15 and. The upper refrigerant passage 14 and the lower refrigerant passage 15 are joined on the leeward side of the indoor heat exchanger 4.

FIG. 3 shows the connection between the pipe and the distributor.
Figure is a front view, Figure 4 is a side view, Figure 5 is a plan view,
16 is a thin tube connected to the decompression device 3, and the inner diameter a is 4.5 m
m. Reference numeral 17 is a thick tube having an inner diameter of 7.4 mm, which is bent into a substantially U shape, and one end 18 thereof is bent at approximately 90 ° to form a thin tube.
16 connections 19 are made. The length b of the straight pipe 20 of the connecting portion 19 is 50 mm, and the radius c of the bent portion 22 connecting the straight pipe 20 and the vertical pipe 21 is 20 mm. The length d of the vertical pipe 21 is 150 m
m, the radius e of the bent part connecting the vertical pipes is 12.5 mm. 23 is a distributor, which has a bifurcated shape and a distribution surface 24
The inlet end (inlet) 26 of the distributor 23 is connected to the thick pipe 21 so that the central axis 25 of the thick line and the central axis 25 of the thick line are substantially orthogonal to each other. And the fifth
As shown in the figure, the angle between the direction of the bent portion and the direction of connecting the outlet passages is at a right angle.
Further, one outlet end (outlet) 27 of the distributor 23 is connected to the upper side refrigerant passage 14 of the indoor heat exchanger 3, and the other outlet end 28 is connected to the lower side refrigerant passage 15.

As shown in FIGS. 3 to 5, the inlet end 26 and the outlet ends 27 and 28 are oriented in the same plane.

Further, the thick pipe 17 is formed with bent portions 22 and 22A along a plane that intersects substantially perpendicularly with the plane, 22 is a bent portion bent about 180 degrees near the distributor 23, and 22A is a thin pipe. 16
It is a bent part that is bent about 90 degrees near.

In the air conditioner having such a configuration, the compressor 1
When the refrigerant is operated, the refrigerant flows in a liquid-rich refrigerant as shown by the arrow in FIG. 1, and when the refrigerant flows from the thin tube 16 to the thick tube 17, the refrigerant spreads and flows in a gentle state.
Refrigerant is less likely to flow unevenly, and the bent portion of the thick pipe 17 is
At 22, the refrigerant is made to flow along the inner wall 50A on the outer peripheral side, so that in the bent portion 22, the refrigerant alternates between the inner wall 50A on the outer peripheral side and the inner wall 50B on the inner peripheral side as indicated by the broken line arrow in FIG. The inner wall of the thick pipe 17 that flows while being repelled and flows to the outer peripheral side of both outlet ends 27, 28 of the distributor 23 (in FIG. In FIG. 4, the refrigerant along the left and right sides of the vertical pipe 21 of the thick pipe is reduced toward this drawing, and the distribution surface 24 of the distributor 23 is reduced.
Is substantially evenly distributed to the two outlet passages 27, 28.

Further, since the distribution surface 24 is arranged to be substantially orthogonal to the central axis of the thick pipe 17, even if the thick pipe is tilted by about 10 ° (the direction of the broken arrow in FIG. 3)
The two outlet passages 27, 28 are substantially evenly distributed.

The table below shows the results of measuring the temperature of the refrigerant flowing through the indoor heat exchanger 4. As shown in FIG. 2, point A is the inlet point of the upper and lower refrigerant passages 14, 15 and the point B. Is a bend portion of the upper refrigerant passage 14, point C is an outlet point of the upper refrigerant passage 14,
Point D indicates the exit point of the lower refrigerant passage 15, point E indicates the bend portion of the lower passage 15, point F indicates the point of the confluence pipe 29, a when the thick pipe 17 is held vertically, This is when the tube 17 is held in a tilted state by about 10 ° (see FIG. 3).

From this table, when the thick pipe 17 is held vertically (state A), the outlet points (points C and D) of all the refrigerant passages have the same temperature, and the two refrigerant passages 14 and 15 are almost evenly distributed. It is considered that the refrigerant was distributed.

Further, when the thick pipe 17 is tilted about 10 ° (state of B), the temperature of the outlet point (point D) of the lower refrigerant passage 15 is higher than that of the upper refrigerant passage.
Since the temperature is slightly lower than the temperature at the exit point (point C) of 14, it is considered that a large amount of refrigerant has flowed into the refrigerant passage 15 below the upper refrigerant passage 14. However, even at this time, the refrigerant temperature at the confluence point (point F) is almost the same as that in the case a, so there is little trouble.

(G) Effect of the Invention As described above, according to the refrigerating apparatus of the present invention, the distributor having one inlet and two outlets is used to divide the refrigerant into two flow paths in the heat exchanger. In the refrigerating apparatus having the refrigeration cycle, the one inlet and the two outlets of the distributor are oriented in the same plane, and the thick pipe connected between the inlet and the thin pipe of the distributor is A bent portion is formed along a plane that intersects the plane substantially perpendicularly, and the distributor is provided with a distribution surface that is substantially orthogonal to the central axis of the thick tube. Therefore, by guiding the refrigerant flowing out of the refrigeration equipment to the thick tube having a passage larger than the thin tube, the refrigerant spreads and flows in a gentle state, so that the refrigerant is less likely to flow unevenly, and moreover, due to the bent portion of the thick tube, Along the inner wall on the outer peripheral side of the bent portion, the amount of the refrigerant along the inner wall of the thick pipe flowing to the outer peripheral side of both outlets of the distributor is reduced, and this refrigerant is applied to the distribution surface of the distributor for distribution. Since this is done, the refrigerant can be split into the branch pipes of the distributor substantially evenly. Therefore, the distribution performance of the distributor is improved, and the refrigerant can be evenly flowed through the plurality of refrigerant passages of the heat exchanger to effectively utilize the heat transfer area of the heat exchanger.

[Brief description of drawings]

The drawings show an embodiment of the refrigerating apparatus of the present invention.
FIG. 2 is a refrigerant circuit diagram of the device, FIG. 2 is a sectional view of a main part of an indoor unit in which the indoor heat exchanger of the device is housed, and FIG. 3 shows a connection state between a distributor of the device and a refrigerant pipe. A front view of the distributor and the refrigerant pipe, FIG. 4 is a side view of the same, and FIG. 5 is a plan view of the same. 16 …… Narrow tube, 17 …… Thick tube, 22 …… Bent part, 23 …… Distributor, 24 …… Distribution surface.

Claims (1)

[Claims] Claim: What is claimed is: 1. A refrigeration system comprising a refrigeration cycle comprising a distributor having one inlet and two outlets, wherein a refrigerant is diverted to two passages in a heat exchanger.
One inlet and two outlets are directed in the direction along the same plane, and the thick pipe connected between the inlet and the narrow pipe of the distributor is provided with a bent portion along a plane intersecting substantially perpendicularly with the plane, A refrigerating apparatus, wherein the distributor is provided with a distribution surface that is substantially orthogonal to the central axis of the thick tube.